Samsung Galaxy S9+ (SM-G965F) will not turn on or charge: step-by-step diagnostics
From the cable and charger to measurements on the board: battery, C8070 / C8069 / U7006 (charging), current from a bench supply, the R3004 button, the U7011 power chip and inductors, the crystal, the display. Pictures from the Samsung service manual and the PDFs themselves.